CVE-2026-55946CWE-77command-injection

CVE-2026-55946

Medium · published September 18, 2026

CVSS v3.1
6.1
EPSS
0%
Percentile
31.9
In the wild
Unconfirmed
What it is

Ai command injection in Microsoft Copilot allows an unauthorized attacker to disclose information over a network.

The record
Technical detail
CVSS v3.1
6.1 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00390 · 31.9th percentile
Weakness
CWE-77 · Improper Neutralization of Special Elements used in a Command ('Command Injection')
Published
2026-09-18T03:17Z
Affected products (1)
ProductVersionsFixed in
microsoft/copilotall versions—
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55946 · [email protected]
EPSS history
Timeline
  • 19 SEP 03:53Z
    EPSS moved — → 0%
    epss
  • 17 SEP 22:55Z
    Microsoft Copilot Information Disclosure Vulnerability
    cvelistv5